礦山采空區(qū)災害風險分級與失穩(wěn)預警方法
[Abstract]:In view of the theoretical difficulties and key technologies in mine goaf disaster assessment and monitoring, this paper has carried out the following innovative work: (1) the classification method, classification characteristics, composition structure and development law of goaf are studied. The basic concept of "goaf (group)" is put forward, and the knowledge system frame of "goaf" is formed. (2) on the basis of the investigation and statistics of goaf in some mines and 49 mines belonging to Minmetals Group, this paper puts forward the method of dividing goaf, and establishes the registration inspection and dynamic evaluation of goaf. (3) using Voronoi structure to divide roof load, based on Obert-Duvall pillar strength criterion and "rheo-catastrophe" theory, a three-dimensional space-time calculation method for the instability chain effect of goaf is established. Based on the laser ranging technology and the interaction theory of surrounding rock and anchor rod, an on-line monitoring and warning system of surrounding rock deformation and stress in goaf is developed based on wireless transmission technology. The methods of local prediction (absolute value prediction, deformation rate prediction, deformation acceleration prediction) and regional prediction are put forward, and applied research is carried out in Pangushan tungsten mine and Xishimen iron mine. The understanding and results obtained in this paper are of positive significance to the safety supervision of goaf and the disaster assessment and monitoring of goaf in China.
【學位授予單位】:北京科技大學
【學位級別】:博士
【學位授予年份】:2015
【分類號】:TD32
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